Self heating and extinguishing sad-iron.



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S. E K W A H T.. nu. 7 01 9 Qu nu N SELF HEATING AND'EXI'INGUISHING SAD IRON.

APPLICATION FILED MAR. 3. 1902.

2 SHEETS-SHEET 1.

N0 MOD-EL.

lll-minimun" illlllllll Ill m u No. 739,079. I PATENTBD SEPT. 15, 1903.

T. HAWKES.

SELF HEATING AND EXTINGUISHING SAD IRON. APPLIOATIQN FILED ma. s. i902 No MODEL. 2 sHEBTs-sHBET z.

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- UNITED'- STATES' ratentei september 15, 190e.

'PATENT OFFICE.

THOMAS HAwKEs, orcIncAGo, ILLiNors.

SELF HEATIN-GANQ EXTINGUlsl-lmc SAD-IRON.

SPECIFICATION forming*- part of Letters Patent No. 739,079, dated September 15, 1903.

Application inl-.a March s, 1902.

To all whom, it muy concern/ Be it known that I, THOMAS IIAWKES, ai citizen of ,the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and use-V ful Improvements in Self Heating and Extin-` guishing Sad-Irons; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had Vto the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in sad-irons, andrmore particularly to a sad-iron adapted to be heated by a hyd rooarbon vapor, such as gasolene or the like. Heretofore such sad-irons have been objectionable, owing to the fact that experience has shown that danger of explosion exists even when used by a skilful operator. This danger is of course increased when the operatoris not accus-` an abundant supply so long as the iron is in actual use, but discontinuing the supply of fuel shortly after the iron is permitted to be at rest.

It is also the object of the invention to provide novel and self cleaning generating means and jet-block.

The invention embodies many novel features; and it consists of matters hereinafter Fig. 1.

described, and more fully pointed out and described inthe appended claims.

In the drawings, Figure 1 is a central longitudinal vertical section of a device embodying nay-invention. Fig 2 is ahorizontal section taken partly in the plane of the generator-tubes. Fig. 3 is a top plan view of the iron. Fig. 4 is a. section taken on line et 4 of Fig. 5 is an enlarged detail of the jet-block, showing the same in central vertisemi No. 96.550. KNO man.)

cal longitudinal section. Fig. G is a longitudinal section of the return generator-pipe which connects opposite sides of the generator-coil.

As shown in the drawings, A indicates the base of the iron, which, as shown, is pointed at its front end and conveniently may have itsgreatest width adjacent to its rear end, which, as well as said front end, is inclined slightly upward in a familiar manner. tegral with the base are the upwardlyextending side walls notched or apertured along the upper portion thereof to admit of the infiow of atmospheric air and connected integrally at their front ends with a relatively thick upwardlyextending post a, which serves as a counterbalance for the hydrocarbon-tank carried at the rear of the base.

B indicates the top plate or cover for the with the top of the same and is adapted at 'its front end to engage in a recess, as shown vin the rear side of thepost ct.

yAt the rear end of said plate is an upwardly-extending 'post l) of approximately the same height as the post a. Said posts are connected at their tops by the handle C, of wood or other nonheat-conducting material, which, as shown,

is recessed or notched on its under side to receive said posts and through which extend the screws o, which firmly secure the handle thereto. The post b extends downwardly be- A'low the plate B and is apertured to receive the burner Gr. Said post b is rigidly connected with the base by means of the jetb1ock,(indicated as a whole by D.) As shown,

, said jet-block is provided with a forwardlyprojecting part having thereon a vertical flange d, adapted to be screwed or b'olted on the rear sidelof said post b', and a downwardlyprojecting part also iianged, as indicated by d', adapted to be rigidly bolted or screwed to the base. n

- The hydrocarbon-reservoir, as shown, is supported at the rear end of the sad-iron and preferably from the non-conducting handle by means of central lugs e', which extend upwardly andare secured on each side to the rearwardly-projecting end thereof by means of a bolt .c' or other desired means.

iron, which conforms in shape approximately IOO Said reservoir may conveniently be conin Fig. 4, and comprises a cylindric body portion E and integral head E2. E' indicates the other head, which is also of cast metal and has screw-threaded engagement with the body portion E of the reservoir and is also.

permanently soldered or brazed thereto. Said head is provided on its inner side with an the iron.

trally in the head E and. opens into saidl pocket and is adapted to be tightly closed by a screw-plug e2. Opening downwardly and forwardly from the bottom of said pocket is the passage e4, in which is rigidly connected one end of the generator' and feed pipe F.

This pipe, as shown, extends forwardly be 10W the plate B and laterally through the side wall of the iron, from which point it extends forwardly to near the front end of the burner, at which point it is bent back upon itself and extends rearwardly above the burner G and connects in .a horizontal passage fwith the jet-block D. The jet-block indicated as a whole by D) serves to attach the handle and reservoir to the base and provides improved means for controlling and regulating the su pply of fuel to the burner,embracinga valve H, Fig. 5,adapted to positivelyclose said passage f, and provided ou its inner end with a forwardlydirected rod or wire h, which extends longitudinally within the pipe F for the greater part ofthe length of the burner and serves to restrict the passage and hy its rotation when the valve is moved acts to dislodge any foreign particles in the pipe. A valve-stem 7L' extends oppositely from said rod t and has screw-threaded engagement in the jet-block in the usual manner and is provided on its outer end with means for rotating the same. Said valve H closes the passage fand partly closes the upper end of the passagef', which leads downwardly from the passage fand is of comparatively large diameter, serving as an expansion-chamber. A relatively small aperture opens into the mixing-chamber g from said passage, and a valve H', provided with a central needlepoint f2, passes transversely through said passage and seats in and closes said aperture, in which the needle-point f2 fits loosely.4 A stem h2 and external operating means are provided on said valve. Said passage f' extends below the Valve H', forming a pocket adapted to receive the accumulation of dirt, dust, or sediment, frequently found in hydrocarbon oil and gasolene. Said passage is closed at its lower end by a screw-plug f3,

which may be removed for the purpose of cleaning the jet-block.

Connecting the adjacent sides of the coil or pipe F, above the burner, is the relatively short transverse pipe F', which, as shown, is approximatelyl of the same diameter as the pipe F and is rigidly and permanently secured thereto by brazing or other means near the rear end of the burner and opens at each of its ends into said pipe through relatively small or restricted passages, which may be located near the top of the pipe F' and which extend obliquely downward through the side wall of the pipe F.

The burner G extends through the aperture in the lower end of the post b and forwardly beneath the generating-coil F to near the post a. Apertures are provided along the length of said burner to permit the escape of the hydrocarbon vapor therefrom into the interior of the sad-iron. The mixingchamber comprises a sleeve of wire-gauze g,

secured on the rear end of the burner and into which the jet-aperture in the jet-block opens axially. A relatively small space is left between the jet-orifice and the rear end of the mixing-chamber, so that as the vapor is sprayed therein a sufficient amount of atmospheric airis drawn into the mixing-chamber thereby to support the combustion.

At the rear end of the iron and engaging in vertical grooves on the inner side of the side Wall and the adjacent walls of the post b are the upwardly-sliding doors or shutters I, adapted to be moved upwardly by means ofthe lugs 'i to permit of inserting a torch into the base of the iron beneath to the burner to start generation.

The operation is as follows: The fillingaperture being located on one ofthe ends and below the top of the reservoir and opening into said pocket, the iron with its receptacle must obviously be turned on the opposite side to admit 0f filling. This permits the fluid to How from said pocket and immediately reduces pressure and extingushes tlie flame, assuring safety while filling. The reservoir being filled, is closed and a torch may be inserted beneath said generatortube to start the generation. The heat of the torch vaporizes the hydrocarbon in the tube F, which, owing to the valves H and H'v being closed, produces back pressure in the reservoir. This is greatly augmented by the vapor-ization of the fiuid in the pipe F', from which, owing to its small openings, the vapor blows out with considerable force. The valves H and I-I' may now be opened. The iron is now ready for use. The constant agitation of the fiuid in the receptacle due to the use of the iron causes a portion thereof to slop over into the pocket in the head E', causing the same to be partially filled. Obviously so long as the use of the iron continues if any material amount of gasolene remains in the reservoir a portion thereof will be thrown over into said pocket,

IIO

continuing the supply at the burner. Should,- however, the iron be permitted to stand unused, the llame at the burner in a comparatively short time will exhaust the supply of fuel in said pocket, extinguishing the flame necessarily. After the primary generation the generation continues as follows: The fluid from said pocket flows downwardly through the -passage e4 into the tube F, is heated by the burner and in the form of vapor is forced along the passage restricted by the rod h to the passage f and through the jet-aperture is sprayed into the mixing-chamber and burner for combustion. The considerable amount of heat applied to the transverse tube F vaporizes any liquid hydrocarbon therein contained, which is forced outwardly in two directions with considerable force-first toward the burner and second toward the reservoir, carrying with it any sediment that may have found entrance to the tubes F F. Thus a portion of the vapor generated by the burner is forced back to the receptacle and escaping thereinto acts to regulate the flow into the pipe F and produces pressu-re, which aids the flow of fluid to the burner. The rod h on the valve H when the valve is moved acts to displace any sediment in the pipe F which is carried through the valve H and nds lodgment in the pocket at the lower end of the passage f. The needle f2 of the valve H serves to keep the valve-aperture open at all times when the iron is in use, While the double arrangement of valves affords perfect control of the fuel-supply at the burner at all times.

Asa further improvement I have provided a hand-shield comprising a sheet of metal K, which is provided at each end with upwardlyextending tongues adapted to engage between the insulating-handle and the posts and which below the handle is provided with a'relatively broad horizontal portion acting to deflect the heat.

Obviously any of many kinds of packing and stuffing boxes for said valves may be employed, and any desired material may be used in the construction of the iron or any parts thereof. So,too,the generator-pipe and transverse pipe may be of any desired material, form, or relative size, and may be constructed integrally, if preferred, and I do not desire to be limited to the construction herein described, which illustrates but one of many different possible embodiments of my invention.

Obviously many details of the construction may be varied without departing from the principle of my invention.

I claim as my inventionl. A portable heater of the character described, comprising a burner, an oil-supply tank, a generator intermediate the burner and tank, and means whereby part of the oil will feed from the tank to the generator only upon the agitation of the oil incident to moving the heater; substantially as described.

2. In a self-heating sad-iron, the combination with a hydrocarbon-reservoir, of a generator, a burner connected to the generator,-

and a valveless unobstructed passage leading from the reservoir to the generator whereby part of the oil will be caused to automatically feed fromthe reservoir to the generator by 'the operating movement of the iron.

3. The combination with a sad-iron, its generator and its burner, of a fluid-receptacle carried thereon, a relatively small com part# ment therein opening into the top of the receptacle, a generator-tube extending from the bottom of said compartment over the burner and connecting in a jet-block, a valve controlling the How of iinid therethrough and a metallic rod integrally secured on the valveclosure and extending forwardly in said tube.

4. The combination with a sad-iron, its generator and its burner, of a fluid-receptacle carried thereon, a relatively small compartment therein opening into the top of the receptacle, a generator-tube extending from the bottom of said compartment over the burner and connecting in a jet-block, a valve controlling the liowof fluid therethrough, a metallic rod integrally secured on the valve-closure and extending forwardly in said tube, and a needle-valve in said passage closing the passage to the burner at apoint beyond the first-named valve and adapted to permit the hydrocarbon fuel to be sprayed into the burner.

5. The combination with a sad-iron, of a burner, generator, a hydrocarbon-reservoir carried by the iron, a restricted compartment in said reservoir opening near the top of the reservoir to which the generator connects and avalvecontrolling theliow of thetiuid through lthe generator-tube.

' 6. A self heating and extinguishing'sadiron comprisingin combination thechambered base,a burner theren,a generator-tube adapted to direct fuel into the burner and forming a coil above the same, a receptacle carried on the rear end of the iron, a pocket in one end of the same openingtherein near the top. of the receptacle and into which the hydrocarbon fuel falls during the use of the iron, and a passage communicating with and extending below the pocket and in which one end of the generator-tube is secured.

7. The combination with a sad-iron having a chambered base, of a burner therein, ya hydrocarbon-reservoir carried thereon, a gen-v erator and supply pipe comprising a tube connected in the reservoir and opening intol IIO sides of the coil and a rod or wire extending into the supply and generator pipe, and a valve connected with said rod and controlling the flow to the burner.

9. A self heating and extinguishing sadiron, comprising an iron having a chambered base, a burner, and a generator therein, a reservoir carried on the base, a relatively small upwardly-opening chamber in one end of said reservoir and disposed laterally of the iron and lling-aperture opening into said chamber below the top of the reservoir and means for hermetically sealing the lling-aperture.

10. The combination in a self-heating sadiron, its burner and generator, of a hydrocarbon-reservoir carried thereon, a relatively small upwardly-opening pocket therein disposed laterally of the iron and having an external opening filling-aperture located laterally of the iron and below the top of the reservoir and means for closing the fillingaperture.

11. A reservoir for the purpose specified comprising a casing, a relatively small upwardly-opening pocket on one side thereof, and a passage extending therefrom adapted to afford connection with a generator.

l2. A reservoir for the purpose speciiied comprising a casing having one head integral therewith, the other head screw-threaded thereon, and a relatively small upwardly- 14. The combination with a sad-iron, its

burner and its generator, of a receptacle secured thereon, an upwardly-opening pocket disposed laterally in the receptacle and adapted to contain the fluid to supply the burner, a filling-aperture extending into said pocket and so disposed as to necessitate turning the iron upon its side in filling thereby permitting the escape of the hydrocarbon from the pocket and necessitating the extinguishment at the burner before filling the receptacle.

In witness whereof I have hereunto signed my name in the presence of two witnesses.

THOMAS HAWKES.

Vtitnesses:

C. W. HILLS, ALFRED C. ODELL. 

